Harry Palmer, a former British Secret Service agent, now operates as a private detective. His initial task is to deliver a seemingly ordinary Thermos flask to an old acquaintance in Helsinki. However, Palmer's curiosity is piqued by the flask's contents and the true intentions of his friend and their Texan billionaire boss.

Info about Billion Dollar Brain
Studio(s): Lowndes Productions Limited
Originally Released: United States, Dec 20, 1967
Production Country: United Kingdom
Billion Dollar Brain: Where to Watch Online?
Currently, you have the opportunity to watch "Billion Dollar Brain" by streaming it on the following platforms: Prime Video or alternatively, you can enjoy it completely free of charge with advertisements on the following platforms: Pluto TV. Additionally, viewers have the option to either rent or purchase "Billion Dollar Brain" on the following digital platforms: VUDU, FlixFling.